Question

AT COMMAND GSM Modem using USSD & Vbscript

Asked by: ultrojo

Hi EE
I attached the code snipped here:

i try using via Hyperterminal to check balance my prepaid. using ussd at command  *124# and its works  return msg "OK"  then new line " Your Prepaid Balance isxxxxxxxx"

My Problem is when i try to use MSCOMMLib.MSComm from my vbscript file. its not works.
the message only return "OK"

TQ in advance

Sub USSD()
 	Set MSComm1=CreateObject("MSCOMMLib.MSComm")
	MSComm1.Settings = "9600,n,8,1"
	MSComm1.InputLen = 0
	MSComm1.RThreshold = 5
	MSComm1.CommPort = 4
	MSComm1.InBufferCount = 0
	MSComm1.PortOpen = True
	MSComm1.Output="AT+CMGF=1" & vbcrlf
	WScript.Sleep(1000)
 
    TextCommand = "*124#"
    strCommand = "AT+CUSD=1," & Chr(34) & TextCommand & Chr(34) & ",15"
    MSComm1.Output=strCommand				' Send USSD Command
    WScript.Sleep(10000)
    strResponse=MSComm1.Input
 
    If (InStr(strResponse, "OK") > 0) Then             	     ' Response should be OK
        MSComm1.Output=" "
	WScript.Sleep(10000)  	   			 	' Wait for response
       	strResponse2=MSComm1.Input
	
	If (InStr(strResponse2, "+CUSD:") > 0) Then          ' If USSD response is received, display text between ""
            strFields = Split(strResponse2, Chr(34))
            modemReply = strFields(1)
	Else
	    modemReply = "Error strResponse2"
        End If
    ELSE
            modemReply = "Error strResponse"
    End If
 
    MSComm1.PortOpen = False
   set MSComm1=nothing
    
End Sub
 
Call USSD()
msgbox modemReply
                                  
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Asked On
2007-12-11 at 20:36:59ID23017550
Tags

command

,

ussd

,

modem

,

vbscript

Topics

VB Script

,

Miscellaneous Programming

,

Active Server Pages (ASP)

Participating Experts
1
Points
50
Comments
2

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Answers

 

by: LebougrePosted on 2007-12-18 at 17:04:45ID: 20496894

Hi,
Try this. After the "OK" answer send the command "AT" otherwise the " ". See under...
...
If (InStr(strResponse, "OK") > 0) Then                        ' Response should be OK
        MSComm1.Output="AT "  <-----HERE
       WScript.Sleep(10000)                           ' Wait for response
             strResponse2=MSComm1.Input
...
I thing you will have the good answer.

Regards.
Lebougre.

 

by: ultrojoPosted on 2007-12-19 at 00:07:22ID: 20498147

Lebougre, thanks for your good comments
i solved the problem already:

If (InStr(strResponse, "OK") > 0) Then                        ' Response should be OK
        MSComm1.Output=" "  &vbcrlf <-----HERE
       WScript.Sleep(10000)                           ' Wait for response
             strResponse2=MSComm1.Input
...

Regards
ultorjo

20120131-EE-VQP-002

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